Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
The only letter not appearing on the Periodic Table is the letter "J".
180
A ball of glass will bounce higher than a ball made of rubber.
73
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Iron weighs more after it rusts.
68
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Most dust particles in your house are made from dead skin!
67